$\"\"$

The sentence is, “twice a number t decreased by 8 equals 70”.

The word “decreased “indicates the symbol “ $\"\"$ ”.

The word “twice a number t” can be represented as “2t”.

The word “equals” can be represented as “=” symbol.

$\"\"$

Rewrite the sentence into equation, \ \

$\"\"$ $\"\"$

The equation is $\"\"$ .